Combined choke-coil and fuse.



Patented Nov. 12, 1918.

J. L. FAY.

COMBINED CHUKE COFL AND FUSE.

APPLmATloN mio APH. 19. 191e. 1,284,629.

JOHN L. FAY, OF ST. LOUIS, MIS SOURI.

COMBINED CHOKE-COIL AND FUSE.

Specication of Letters Patent.

Patented Nov. 12, 191 8.

Application fned Ap'rn 19, 191s. ser1a1No.229,55s.

To all whom it may concern.'

Be it known that I, Joinv L. FAY. a citizen ot' the United Statics. reeidng at St. Louis. Missouri. have invented a Certain new and useful Improvement in Coinhiued Choke- ('oils and Fuses. of which the following' is a full. clear. and exactl description, Such as will euahle other@l skilled in the art. to which it apport-airis to malte and use the same. reference heing had to the accompanying drawings, forming part ot this specilication. i

M v invention relates` to a combined choke coil and fuse such as is orflinarily used in tranamiesion linea or distril'iution ril-cuite` for the protection of traiieforniers and lilte equipment, my present invention being an improvement on the combined choke coil and fuse disclosed in n'rv Patent No. 1,187.89 t, issued June 20, 1916.

The principal objects of in v present invention are, to generali)Y improve upon and Simplify the construction of the choke coil and fuse disclosed in niv patent, atoresaid; to provide simple and efficient means for effecting a tlmrough Ainsulf'ition ot' thtl choke coil; to provide 'for tlul rcadlv escape` ot' the flauwe agaiuet a rtielativelv high drgree ot pressure prmlucetl thereby when the fuso forming :i part oli the device is burned out ae a result of overload or For anyY other causes; to provide a eonetruction wherein the fuse malv he eaailv and quickly placed in proper position tor use: to provide a. combined choke coil and t'uHe which can be easilyY and cheaply immutactured, which is very compact` and highly' etlieient in service; and further, to provide a con* struction which will afford a relativclv high degree of satetv to the repair-men while the fuse carrying men/ther is heine removed trom or ineerted in the coil housing'.

With the foregoing and other objects in View, my invention consista in certain novel features of construction and arrangement;`

of parts, hereinafter' more full;T described and claimed, and illustratori in the. accom panving drawings, in Whicl1-a Figure 1 is a vertical section taken through the center ot an improved choke. coil and fuse of my improved construction.

Fig. 2 is a horizontal Section taken approaimately1 on the line il -12 of F l.

Fig. 3 is a detail section taken approrr` mately on'the line 3MB ot Fire". l.

Fig. 4 4is a plan view of a bracket. `that .is

utilized for supportingr the choke coil and fuse on a cross arm or the like.

Referring,lr hy numerals to thc acronipanying drawings, 10 designates an inverted cup-shaped housing,f or shell, the saine being constructed of lsuitable 'insulating mate'- rial such as glans or porcelain, and the lower portion ot' this shell or housing is flared out- Wardlyv as deeie'nated h v ll to forni an apron.

Formed in the outer tace of the hody of the houing: l0 i5 a circuitiFerentiallv diaposcd groove l2 which ia adapted to he occupied h v strane or hande t3 and l-t, the saine, being secured to each other in a rtv Suitable manner and the hand li lacing provitlcd with legev 15 which are secured to a rroea arm or the like, thus providing a lirin and Substantial support for the housing4 l0 and parte carried thereby.

.Arranged within the housing l() a sec'- ond housing or Shell tti ot' aahestos, glans. porcelain or other insulating or tireresi:-:t inc' material, said inner housing being closed at its upper end and provided at its lower end vvith an integral llange 'li'. l'orn'ied in the outer face of thia` Shell or housing; lt ia a apirallv disposed groove it? in `vwhich i.: aeat ed a conductor til of suitable n'ietal. preti* eralilv copper, one end ot this roialncfmhe ing' extended dmvnward over the @tigre of Hang-re li and being' clcctrimtlf,7 connected to a pair of Contact plates 20. the inner portions thereof beingr spaced apart: in order to receive a single contact inen'iloer carried by the removahle plug forming a. part of the device.

The housingr 16 carryingr the coil .t9 is Secured to housing` l0 hv a layer or Wall 2l of suitable cement, the saine heine; formed of tire-proof material or materiall which. is not affected hy rclativelv high r'legzrees of heat.

The Wire or conductor forming the coil on housing;r 16 is extended downward from the upper end of Said houehu,r through this wall or layer ot." cement as dee'igznated hy Q2 and embedded in eaid cement and interposed hetzwccn the portion QQ and the adjacent; coils is a verticali;y disposed strip of mica or analogous material. Thelower end ot portion of the conductor projects downwarflljv trorn the lower end of the Wall or laver ot" cement and thence passes outI wardlv beneath the apron 'll Vto he connected to the line conductor.

T he construction just descrittori provides means for very firmly ing 16 within the outer housing-10 and likewise for protecting the choke coil located in the spiral groove- 18.

Securedl in any suitable manner to the underside of flange 17 and disposed directly opposite to the pair of contact plates 20 is a pair of contact plates 2l. the ends thereof being preferably spread apart as illustrated in Fig. 3 in order to receive an outwardly projecting contact. member carried by the removable plug forming a part of the device.

Suitably connected to these contact plates 24 is one ot the terminals 25 of the line conductor.

The removable plug or fuse carrying member includes a handle 26 of porcelain,

glass or analogous material. the same being provided with an axially disposed bore or passageway 2T. Formed integral with the lower end of this handle 26 is an outwardly projecting flange 28 and formed integra-l with the upper end of said handle is an outwardly projecting relatively wide flange 29. the same being adapted to overliethe contact plates 20 and 24 when the removable member is properly inserted in the coil carrying housing.

Secured in any suitable manner to thel upper end of handle 26 is a plug 30 of asbestos or analogous fire-resisting material, and formed diametrically through this plug i's an aperture 31, the same communicating` with the upper end of a bore or passageway 32, the lower end of the latter communcating with the upper end of the bore or passageway 27.

Secured in any suitable mannerr to the upper portion of handle 26 above the tlange 29 are oppositely arranged contact plates 33, the same being adapted to engage between the pairs of contact plates 2O and'24.

Formed in the outer face of the plug 30 and 'on opposite sides thereof is a longitudinally disposed groove 34 the same serving 'as a seat for the fuse 35, the ends ot the latter beingr connected in any suitable manner to contact plates 33.

It will be noted that the aperture 31 is disposed at right angles to the plane occua pied by the fuse 35 when the latter is properly positioned in groove 34, and consequently it will be impossible for portions of the fuse to arc through said opening 31 when said fuse explodes or burns out.

When the fuse carrying member comprising the handle 26 and plug 30 is to be positioned in -the coil carrying housing. the operator grasps the handle 26 between the flanges 28 and 29 and ymoves the plug 30 upwardly into the chamber within housing 16 during Which time the handof the operator is protected against the contact of plates 20 and 24 by the relatively wide anchoring thchousflange 29. This upward movement is contnued until contact plates 33 strike against the underside of [lange 17 whereupon the handle is rotated until the contact plates 33 pass between the pairs of contact plates20 and 24, and thus the fuse and choke coil are brought into circuit with the terminals of the line in which the device is located.

In the event that the fuse carried b v the plug 30 blows out. the flame and gases resulting from such blow-out will find ready exit through opening 31 and from thence downwardly through passageways 32 and 27.

It will be understood that the blowingout of a fuse creates a relatively high dc- Igrec of pressure and that this pressure would be destructive to parts 0f the device were it not for the fact 'that the relatively large openings 31, 32 and 27 provide escape for such pressure. thereby nullifying its destructive tendencies.

When in service. my improved device is located on :Leni-table support or cross arm adjacent to a transformer. or other apparatus and when so positioned. said transformer o'r apparatus is effectively protected against sudden rushes of current which may come in on the line as a result of lightning discharge. for the choke coil disposed upon the housing` 16 has the effect of damping or choking the rush of current` thereby preventing strain on the transformer windings, Y reducing break-down of the transformer insulation, and likewiseprevent/ing the interruption of service to consumers of current'. 4100 The relativelywvide flange 29 at the upper end of the handle 26 serves as a closure for the chamber inhousing 16 and consequentl.' the plug 30, the fuse carried thereby; an t the contact plates 20 and 24 are ell'etively 106 protected against rain, snow, ice and the like. Likewise this wide {lange serves't protect the hand of the'repairman while the plug is being placed in position within or removed from the coil housing.

A device of rnv improved construction is comparatively simple. can be easily and cheaply manufactured, and provides an eiticient protection for transformer and like devices against abnormal and destructive 116 currents coming in over a transmission line or distribution circuit.

It. will be readily understood that minor changes in the size. form and construction of the various parts of my improved choke 120 coil and fuse may be made and substituted for those herein shown and described, without departing from the spirit. of my invention. the scope of which is set forth in the appended claims.

I claim:

1. In a. device of the class described, an outer housing, a hollow member within said outer housing. a choke coil on said hdllow member, a body ofinsulation inclosing said 180 choke coil and disposed between the hollow member and the housing, and a fuse carry- 1n plug removably positioned within said ho low member.

2. In a device of the class described, an outer housing, a hollow member within said outer housing, a choke coil on said hollow member, a body of insulation inclosing said choke coil and dis osed between the hollow member and the liousing, a fuse carrying plug removably positioned within said holw member, and means carried by` said plug and hollow member or making contact between the choke coil and the fuse carried by said removable plug.

3. In a device of the class described, a housing, a choke coil embedded in the wall of said housing, a fuse carrying plu adapted to be removably positioned in sai housing, and means 'bnssaid plug and the housing for makin contabbeuween said choke coil and the Iuse carried by said removable plug.

4. In a device of the class described, inner and outer housings, a choke coil wound upon the inner housing, a plug adapted to be removably positioned within said inner housin a fuse carried by said plug, means on sai plug and the inner housing for establishing communication between the fuse and choke coil, and said plug being provided with an opening to permit the -discharge of the flames and gases resulting from the blowing of the fuse.

5. In a device of the class described, a housing, a choke coil therein, a member adapted to be removably ap'lied to, said housing, a plug carried by sai member and adapted to enter the housin a fuse carried by said plug, means for ma ing contact between said fuse and choke coil, and there being openings formed in said removable member and plug carried thereby.

6. In a device of the class described a housing, a hollow member arranged wit in and a plug of fire-resisting material, a fuse 4 carried by said plug, and there being openings in said plug anc handle to permit the escape of iames and gases from the chamber in the housing occupied by the plug and fuse carried thereby.

8. In a device of the class described, a housing of fire-resisting material, aK choke coil embedded in the wall of said housing, a member adapted to be removably positioned in said housing, said member being formed of fire-resisting material, a fuse carried by said member, means for forming a connection between said fuse and choke coil when the member is applied to the housing, and said removable member being provided with an opening to permit the escape of flames and gases from the chamber occupied by said member and the fuse carried thereby.

9. In a device of the class described, a housing, a choke coil within said housin tue main body portion of which choke coil is covered by insulating material, a member adapted to be removably positioned in said housing, a fuse carried by said removable member, sald removable member being provided with a opening to permit the discharge of flame and gases resulting from the blowing of the fuse, and means for inaking1 contact between said fuse and choke co1 In testimony whereof I hereunto aiiix my signature this 16th day of April, 1918.

JOHN L. FAY. 

